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首页> 外文会议>Geothermal Resources Council Annual Meeting Expo >Exploration Risk Assessment of the Mt. Talang Geothermal System, Sumatra, Indonesia
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Exploration Risk Assessment of the Mt. Talang Geothermal System, Sumatra, Indonesia

机译：山丘地热系统勘探风险评估，印度尼西亚苏门答腊省

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As lower risk prospects in Indonesia are developed, the next phase of high temperature geothermal exploration will include an increasing focus on exploration for neutral reservoirs adjacent to vapor core volcanoes, like Mt. Talang in Western Sumatra. The existence of a neutral geothermal reservoir located below the flank Mt. Talang volcano, that very likely has a vapor/acid core, can be discriminated by the neutral and the vapor core systems using water and gas geochemistry from springs and fumaroles, magnetotelluric (MT) resistivity imaging, geology and structural data sets. Mt. Talang is a predominantly andesite volcano within a trans-tensional basin of the Great Sumatra Fault Zone. The volcanic cone is constructed on an ancestral volcano exposed to the south and collapsed to the north. A vapor core has been interpreted from the gas chemistry of summit fumaroles, Mt. Talang's thirteen small magmatic eruptions and surface acid alteration. The preferred conceptual model for Mt. Talang is analogous to a relatively small Mt. Apo, with a neutral, mature, liquid system isolated from a magmatic vapor core by a low permeability shell of clay and anhydrite alteration. Although this strategy for exploring vapor core volcanoes avoids many pitfalls by building conceptual models and testing them against analogs in order to discriminate neutral and vapor core zones, the risk of targeting wells adjacent to vapor core systems can be further mitigated by using lower cost slim hole drilling.
机译：随着印度尼西亚的较低风险前景，高温地热勘探的下一阶段将包括越来越关注邻近蒸汽核心火山的中性水库的探索，如山西山脉。位于侧翼Mt.Parang火山下方的中性地热储存器的存在，非常可能具有蒸气/酸芯，可以通过使用水和燃气地球化学的中性和蒸气芯系统来区别来自弹簧和富马摩尔，MagnetOcellic（MT ）电阻成像，地质和结构数据集。 Mt.Talang是一个主要的Andesite火山，在大苏门答腊故障区的跨张力盆地内。火山锥在暴露于南部的祖传火山上，并倒在北方。蒸汽核心已被解释在峰会粪便的气体化学中，Mt.Talang的十三个小岩浆喷发和表面酸改变。 Mt.Parang的优选概念模型类似于通过粘土的低渗透壳与岩石蒸汽芯中分离的中性，成熟，液体系统的相对小的Mt.Apo。虽然这种探索蒸气芯火山的策略通过建造概念模型来避免许多陷阱，并且以对模拟的方式测试它们以区分中性和蒸气核心区，但可以通过使用较低的成本细长孔进一步减轻邻近蒸汽芯系统井的井的风险钻孔。

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